The big social-media question of 2011 is, Should I start using Google+? I can simplify the issues down to one question: Are your interests as important as your friends? If they are, Google+ provides at great way to interact with a range of people from pundits to photographers. You can see a categorization at RecommendedUsers. You'll find that people on Google+ are much more interactive than on Twitter or Facebook. If this dichotomy is too simple, I've created a decision tree to help you through the selection process of using Twitter, Facebook and Google+.